Rukn al-Dīn Mas'ud, Sultan of Rüm from…

Rukn al-Dīn Mas'ud, Sultan of Rüm from 1116, has continued to hold back Constantinople while patiently expanding his territories at the expense of his crusader, Danishmendid, and other Muslim neighbors.

When the Danishmendids break into warring factions after 1142, Rukn ad-Din Mas'ud begins to absorb their holdings in east-central Anatolia and begins the real development of Konya as a capital city.